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Method and apparatus for improved planar and DC modes for non-zero reference lines

A video decoding and video technology, applied in the field of video encoding and decoding, can solve problems such as inefficiency and undesired

Pending Publication Date: 2020-09-29
TENCENT AMERICA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since angle-only MPMs are used for non-zero reference lines, using multiple MPM list generation procedures is inefficient and undesirable

Method used

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  • Method and apparatus for improved planar and DC modes for non-zero reference lines
  • Method and apparatus for improved planar and DC modes for non-zero reference lines
  • Method and apparatus for improved planar and DC modes for non-zero reference lines

Examples

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Embodiment Construction

[0045] Still referring to FIG. 1A , at the upper left, a square block of 4x4 samples ( 104 ) is depicted (indicated by dashed, bold lines). A square block (104) includes 16 samples, each labeled "S", its position in the Y dimension (eg, row index) and its position in the X dimension (eg, column index). For example, sample S21 is the second sample in the Y dimension (from the top) and the first (from the left) sample in the X dimension. Similarly, sample S44 is the fourth sample in the Y and X dimensions in block (104). Since the size of the block is 4×4 samples, S44 is at the bottom right. Further shown are reference samples that follow a similar numbering scheme. With respect to a block (104), a reference sample is labeled with R, its Y position (eg, row index) and X position (column index). In H.264 and H.265, the predicted samples are adjacent to the block under reconstruction, so there is no need to use negative values.

[0046] Intra-picture prediction is possible by ...

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PUM

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Abstract

A method of video decoding includes retrieving, from a coded video bitstream for a current block encoded in an intra prediction mode, a reference line index indicating a reference line from a plurality of reference lines that include a zero reference line. The method includes determining whether the current block is encoded in a non-angular intra prediction mode. The method includes, in response to the block being encoded in the non-angular intra prediction mode, determining whether the reference line index indicates a non-zero reference line from the plurality of reference lines. The method includes in response to determining that the reference line index is the non-zero reference line, (i) enabling non-angular intra prediction modes for the non-zero reference line, and (ii) decoding thecurrent block with at least one reference sample from the non-zero reference line.

Description

[0001] Incorporate by reference [0002] This application claims priority to U.S. Provisional Application No. 62 / 822,027, "Improved Planar and DC Modes for Non-Zero Reference Lines," filed March 21, 2019, and U.S. Priority to Application Serial No. 16 / 824,751, "Method and Apparatus for Improved Planar and DC Modes for Non-Zero Reference Lines," the entire contents of which are incorporated herein by reference. technical field [0003] The present application relates to video coding and decoding technologies, and in particular to methods, devices, computer equipment and storage media for improved plane and DC modes of non-zero reference lines. Background technique [0004] The background description provided herein is intended to present the context of the application as a whole. What is described in the Background section and in various aspects of this specification is prior art, and has never been expressly or impliedly admitted to be prior art to this application, to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/44H04N19/184H04N19/593H04N19/91H04N19/503H04N7/15
CPCH04N19/44H04N19/184H04N19/593H04N19/91H04N19/503H04N7/15H04N19/105H04N19/159H04N19/176
Inventor 赵亮赵欣李翔刘杉
Owner TENCENT AMERICA LLC
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